Binding Structure between Tank and Header of Automotive Radiator

ABSTRACT

The invention involves positive contact to create a binding structure between tank and header of an automotive radiator, specifically the upper tank ( 3 ), with the upper header ( 4 ), and the bottom tank ( 9 ) with the bottom header ( 11 ). There is a first metal hem  3.1  of downward extension from the lower edge of the upper tank ( 3 ), corresponding to the first metal hem there is a second metal hem  4.1  of vertically downward extension from the outer edge of the upper header ( 4 ). Said first hem tightly encloses the second hem thereby allowing a complete and positive bound by brazing. There is a third metal Hem  9.1  of upward extension from the upper edge of the bottom tank ( 9 ), corresponding to the third metal hem there is a fourth metal hem  11.1  of vertically upward extension from the outer edge of the bottom header ( 11 ). Said third hem tightly encloses the said fourth hem thereby allowing a complete and positive bound by brazing. This structure of tank enclosing header ensures the integrated structure of the radiator and the firm binding between tank and header.

CROSS REFERENCE TO RELATED PATENT APPLICATION

The present application claims the priority of the Chinese patent application No. 200810195930.1 filed on Sep. 5, 2008, which application is incorporated herein by reference.

FIELD OF THE INVENTION

The invention involves an automotive radiator, particularly a type of binding structure between tank and header of an automotive radiator, which belongs to the field of auto parts technology.

BACKGROUND OF THE INVENTION

Automotive radiator is an auto part dissipating heat using the cooling water from the automotive engine, it includes 10 parts: inlet pipe, outlet pipe, filler, upper tank, bottom tank, header, tube, cooling fins, side plate and side bracket. The biggest problem encountered during the manufacturing process is that the brazing between the tank and header is not firm enough thus will cause leak and failure of the radiator.

SUMMARY OF THE INVENTION

The purpose of this invention is to overcome the above shortages, and to provide a type of structure to strengthen the binding between tank and header of the automotive radiator.

The purpose is achieved through the binding structure between tank and header of automotive radiator, including the upper tank, bottom tank and header,

a first metal hem defined by downward extension of the lower edge of the upper tank, corresponding to the first hem a second metal hem defined by downward extension from the outer edge of the upper header, the first metal hem tightly encloses the second metal hem mechanically and then the first hem and second hem are completely bonded by brazing;

a third metal hem defined by upward extension of the upper edge of the bottom tank, corresponding to the third hem a fourth hem defined by upward extension of the outer edge of the bottom header, the third hem tightly encloses the fourth hem mechanically and then the third hem and fourth hem are completely bonded by brazing. This structure of tank enclosing header ensures the integrated structure of the radiator and the firm binding between tank and header, it reduces the cost of production, also ensures the good appearance of the radiator by one-shot brazing.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is the overall view of the structure of an automotive radiator involved in this invention

FIG. 2 is the breakdown of the binding between the upper tank and the upper header of the automotive radiator before binding

FIG. 3 is the assembly drawing of the binding between the upper tank and the upper header of the automotive radiator after binding

FIG. 4 is the breakdown of the binding between the bottom tank and the bottom header of the automotive radiator before binding

FIG. 5 is the assembly drawing of the binding between the bottom tank and the bottom header of the automotive radiator after binding

In the drawings: inlet pipe 1, filler 2, upper tank 3, upper header 4, side plate 5, side bracket 6, cooling fins 7, tube 8, bottom tank 9, outlet pipe 10, bottom header 11, first metal hem 3.1, second metal hem 4.1, third metal hem 9.1, fourth metal hem 11.1.

DETAIL DESCRIPTION OF THE INVENTION

In reference to FIG. 1, the automotive radiator of the present invention comprises the inlet pipe 1, filler 2, upper tank 3, upper header 4, side plate 5, side bracket 6, cooling fins 7, tube 8, bottom tank 9, outlet pipe 10, bottom header 11.

In reference to FIG. 2, there is a first metal hem 3.1 of outward extension from the lower edge of the upper tank (3), corresponding to the first metal hem of downward extension, there is a second hem 4.1 of vertically downward extension from the outer edge of the upper header (4). Said first hem tightly encloses the said second hem, thereby allowing a complete and positive bong by brazing as shown in FIG. 3.

In reference to FIG. 4, there is a third metal hem 9.1 of upward extension from the upper edge of the bottom tank (9), corresponding to the third hem there is a fourth metal hem 11.1 of vertically upward extension from the outer edge of the bottom header (11). Said third metal hem 9.1 tightly encloses the said fourth hem 11.1, thereby allowing a complete and positive bond by brazing as shown in FIG. 5. 

1. A binding structure between tank and header of an automotive radiator comprising: an upper tank, an upper header, a bottom tank and a bottom header); a first metal hem defined by downward extension of the lower edge of the upper tank, corresponding to the first hem a second metal hem defined by downward extension from the outer edge of the upper header, the first metal hem tightly encloses the second metal hem mechanically and then the first hem and second hem are completely bonded by brazing; a third metal hem defined by upward extension of the upper edge of the bottom tank, corresponding to the third hem a fourth hem defined by upward extension of the outer edge of the bottom header, the third hem tightly encloses the fourth hem mechanically and then the third hem and fourth hem are completely bonded by brazing. 